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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.






2. Help to signal hormone levels which we need both in the brain right next to each other.






3. Implies the amount of estrogen production






4. 30 hours after estrus begins






5. Male on one pin and female on other side






6. Standing to be mounted (last one able to notice); mounting other animals; social behavior-restless - gregarious - activity - vocalizing; frequent urination; mucous discharge






7. (switzerland) 2nd in size and milk production - most muscle -






8. Head - neck - mid-piece - tail. genetic material - has an enzyme covering that allows it to penetrate the egg






9. Birthing process (termination of gestation)






10. Produce testosterone. located between the seminiferous tubules






11. The more stressed out the male is - the less sperm he is going to produce






12. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood






13. 1. reproduction - 2. mastitis/udder problems - 3. low milk production - 4. soundness/poor feet and legs (living on concrete)






14. (LH) stimulates the Leydig cells to produce testosterone






15. Milk ~305 days - dry 60 days prior to calving






16. Can produce 200 calves naturally (~100 bulls) - top 1-2% will grade like him. everything left to chance if no AI performed






17. Can survive ~7 days in cow. vast majority <48 hours






18. What about the sperm for a bull which has been castrated but still has testicles?






19. When are dairy cattle dehorned?






20. 16-20 hours






21. 14-19 (17) days






22. 19-23 (21) days






23. Animals which have many estrous periods during certain periods per year (ex: mare - ewe)






24. Knife-loose ~1wk of growth. band-loose ~2wks of growth.






25. ~60 days before calving






26. Cleans and lubricates the urethra. secretion is thick - viscous - and very slippery.


27. Prevent the cow from getting an infection from the calve






28. 2 month growth cycle. stored in the epididymis of the bull






29. Days which have increasing daylight hours


30. What makes the milk flow through the mammary glands?






31. Not under a timeline - cow can not be sold as steak






32. Front feet and head first. (except for hogs and dogs)






33. Duct through penis that carries sperm and urine






34. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm






35. 24 hours before end of estrus cycle






36. Parturition is controlled by...






37. Castration tool that uses a band around the testicles which cuts off circulation and eventually the testicles fall off






38. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)






39. ~305 days (altough often longer due to breeding difficulties)






40. Parturition is controlled by...






41. % of fat in milk. makes cheeses and ice cream. regulates cost of milk






42. Duct through penis that carries sperm and urine






43. Pulls sperm and egg together - gets body ready for pregnany - stimulates growth cells - develops mammary glands - starts to deposit fat.






44. Completes uterine growth initiated by estrogen and prepares the uterus for nourishment of developing embryo if pregnancy occurs - supports pregnancy by maintaining quiescent state of reproductive tract and suppresses mating behavior - prevents ovulat






45. Milk is 15% ________ and 85% __________.






46. Start of the reproductive tract for the female. located outside of the body






47. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)






48. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.






49. Sperm production






50. Scar tissue plugs up chambers of udder